I bought this opener a few months ago. Anfamgs I was delighted with the product. Great idea with the Squeezing the can rim! The cover really fits exactly back on it. What I then however again and since always often happened, that's a very fine metal Spahn, of the Is replaced squeezing the can rim of the can, has drilled when emptying the can into the skin. These shavings are so thin that they almost can not see with the naked eye.
So beware: After the opener of a can with this opener first the edge wipe with a paper towel !!
Therefore, I have a picture with a microscope on paper Background created. Links above the Spahn (blue), right human hair for size comparison. Magnification: 300 times